package org.jboss.windup.rules.apps.javaee.rules.jboss;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

import org.jboss.windup.config.AbstractRuleProvider;
import org.jboss.windup.config.GraphRewrite;
import org.jboss.windup.config.loader.RuleLoaderContext;
import org.jboss.windup.config.metadata.RuleMetadata;
import org.jboss.windup.config.operation.GraphOperation;
import org.jboss.windup.config.phase.MigrationRulesPhase;
import org.jboss.windup.config.query.Query;
import org.jboss.windup.graph.GraphContext;
import org.jboss.windup.graph.model.LinkModel;
import org.jboss.windup.graph.model.ProjectModel;
import org.jboss.windup.graph.model.WindupConfigurationModel;
import org.jboss.windup.graph.model.WindupVertexFrame;
import org.jboss.windup.graph.model.resource.FileModel;
import org.jboss.windup.graph.service.GraphService;
import org.jboss.windup.graph.service.LinkService;
import org.jboss.windup.graph.service.WindupConfigurationService;
import org.jboss.windup.reporting.model.ApplicationReportModel;
import org.jboss.windup.reporting.model.TemplateType;
import org.jboss.windup.reporting.model.WindupVertexListModel;
import org.jboss.windup.reporting.service.ApplicationReportService;
import org.jboss.windup.reporting.service.ReportService;
import org.jboss.windup.rules.apps.javaee.model.EnvironmentReferenceModel;
import org.jboss.windup.rules.apps.javaee.model.WebXmlModel;
import org.jboss.windup.rules.apps.javaee.model.association.VendorSpecificationExtensionModel;
import org.jboss.windup.rules.apps.javaee.service.VendorSpecificationExtensionService;
import org.jboss.windup.util.Theme;
import org.jboss.windup.util.ThemeProvider;
import org.ocpsoft.rewrite.config.Configuration;
import org.ocpsoft.rewrite.config.ConfigurationBuilder;
import org.ocpsoft.rewrite.context.EvaluationContext;

/**
 * Creates a jboss-ejb3.xml for jndi bindings
 */
@RuleMetadata(phase = MigrationRulesPhase.class, id = "Generate jboss-web.xml")
public class GenerateJBossWebDescriptorRuleProvider extends AbstractRuleProvider {
    private static final Logger LOG = Logger.getLogger(GenerateJBossWebDescriptorRuleProvider.class.getName());
    public static final String JBOSS_WEB_TEMPLATE = "/reports/templates/jboss/jboss-web.ftl";

    @Override
    public Configuration getConfiguration(RuleLoaderContext ruleLoaderContext) {
        return ConfigurationBuilder.begin()
                .addRule()
                .when(Query.fromType(WebXmlModel.class))
                .perform(new GraphOperation() {
                    @Override
                    public void perform(GraphRewrite event, EvaluationContext context) {
                        // configuration of current execution
                        WindupConfigurationModel configurationModel = WindupConfigurationService.getConfigurationModel(event.getGraphContext());

                        for (FileModel inputPath : configurationModel.getInputPaths()) {
                            ProjectModel projectModel = inputPath.getProjectModel();
                            transformWebXml(context, event.getGraphContext(), projectModel);
                        }
                    }

                    @Override
                    public String toString() {
                        return "Generate jboss-web.xml";
                    }
                });
    }

    private void transformWebXml(EvaluationContext evaluationContext, GraphContext context, ProjectModel projectModel) {
        Theme theme = ThemeProvider.getInstance().getTheme();

        LinkService linkService = new LinkService(context);
        ApplicationReportService applicationReportService = new ApplicationReportService(context);
        VendorSpecificationExtensionService vendorSpecificService = new VendorSpecificationExtensionService(context);

        for (WebXmlModel webDescriptor : findAllWebXmlsInProject(context, projectModel)) {
            ApplicationReportModel applicationReportModel = applicationReportService.create();
            applicationReportModel.setReportPriority(300);
            applicationReportModel.setDisplayInApplicationReportIndex(false);
            applicationReportModel.setReportName("jboss-web.xml");
            applicationReportModel.setProjectModel(projectModel);
            applicationReportModel.setTemplatePath(JBOSS_WEB_TEMPLATE);
            applicationReportModel.setTemplateType(TemplateType.FREEMARKER);

            GraphService<WindupVertexListModel> listService = new GraphService<>(context, WindupVertexListModel.class);

            WindupVertexListModel environmentReferences = listService.create();
            for (EnvironmentReferenceModel ev : webDescriptor.getEnvironmentReferences()) {
                LOG.info("Reference: " + ev);
                environmentReferences.addItem(ev);
            }

            Map<String, WindupVertexFrame> additionalData = new HashMap<>(4);
            additionalData.put("environmentReferences", environmentReferences);
            applicationReportModel.setRelatedResource(additionalData);

            ReportService reportService = new ReportService(context);
            String ancestorFolder = projectModel.getName();
            if (webDescriptor.getProjectModel().getName() == null || ancestorFolder.equals(webDescriptor.getProjectModel().getName())) {
                applicationReportModel.setReportFilename(reportService.getUniqueFilename("jboss-web", "xml", false, ancestorFolder));
            } else {
                applicationReportModel.setReportFilename(reportService.getUniqueFilename("jboss-web", "xml", false, ancestorFolder, webDescriptor.getProjectModel().getName()));
            }

            LOG.info("Generated jboss-web.xml for " + webDescriptor.getFilePath() + " at: " + applicationReportModel.getReportFilename());
            LinkModel link = linkService.create();
            link.setDescription("JBoss Web XML Descriptor - Generated by " + theme.getBrandName());
            link.setLink(applicationReportModel.getReportFilename());

            webDescriptor.addLinkToTransformedFile(link);

            LinkModel generatedDescriptor = linkService.create();
            generatedDescriptor.setDescription("JBoss Web XML Descriptor - Generated by " + theme.getBrandName());
            generatedDescriptor.setLink(applicationReportModel.getReportFilename());

            for (VendorSpecificationExtensionModel vendorSpecificExtension : vendorSpecificService.getVendorSpecificationExtensions(webDescriptor)) {
                LOG.info("Vendor specific: " + vendorSpecificExtension.getFileName());
                vendorSpecificExtension.addLinkToTransformedFile(generatedDescriptor);
            }
        }
    }

    private Iterable<WebXmlModel> findAllWebXmlsInProject(GraphContext context, ProjectModel projectModel) {
        GraphService<WebXmlModel> webDescriptors = new GraphService<>(context, WebXmlModel.class);
        List<WebXmlModel> resultModels = new ArrayList<>();
        for (WebXmlModel webXmlModel : webDescriptors.findAll()) {
            if (webXmlModel.getProjectModel().getRootProjectModel().equals(projectModel)) {
                resultModels.add(webXmlModel);
            }

        }
        return resultModels;
    }

}
